def serve(args):

	_checkFile(args.datafile)

	if args.tree:

		_checkFile(args.tree)

	if args.host: conf.hosts.insert(0,args.host)

	if args.port: conf.port=args.port

	try:

		s=Miniserver(args.datafile,args.tree)

		spawnDaemon(s.serve)

	except Exception as e:

		log.exception("exception: %s",e)

		print("Failed to start:\n  ",e)

parser=ArgumentParser()

subparsers=parser.add_subparsers()

pBuild=subparsers.add_parser("build")

pBuild.add_argument("-f","--force",action="store_true",help="force tree rebuild")

pBuild.add_argument("treefile", help="stored hash tree location")

pBuild.add_argument("datafile")

pBuild.set_defaults(func=buildTree)

pUpdate=subparsers.add_parser("push")

pUpdate.add_argument("-p","--port",type=int)

pUpdate.add_argument("--host")

pUpdate.add_argument("-t","--tree",help="stored hash tree location")

pUpdate.add_argument("datafile")

pUpdate.set_defaults(func=push)

pUpdate=subparsers.add_parser("pull")

pUpdate.add_argument("-p","--port",type=int)

pUpdate.add_argument("--host")

pUpdate.add_argument("-t","--tree",help="stored hash tree location")

pUpdate.add_argument("-f","--force",action="store_true",help="ignore lock file")

pUpdate.add_argument("datafile")

pUpdate.set_defaults(func=pull)

pServe=subparsers.add_parser("serve")

pServe.add_argument("-p","--port",type=int)

pServe.add_argument("--host")

pServe.add_argument("-t","--tree",help="stored hash tree location")

pServe.add_argument("datafile")

pServe.set_defaults(func=serve)

args=parser.parse_args()